Ipv4 Network Communication Failure; Communication Is Disabled Or Is Disconnected - NEC IP8800/S2400 Series Troubleshooting Manual

3.
Troubleshooting Functional Failures in Operation
3.6

IPv4 Network Communication Failure

3.6.1

Communication Is Disabled or Is Disconnected

There are three possible causes that result in communication failure on the IPv4 network using this system.
1. Configuration on IP communication has changed
2. Network configuration has changed
3. Network component failures
For 1 and 2 above, check for the differences in the configuration and network configuration provided before and after
the change. Check for any difference disabling communication.
This section describes procedure to identify the failed part and to isolate the problem, mainly for the cases of "IP
communication is disabled although the configuration and network configuration are correct." and "IP communication
had been normally running but it is disabled now." as in above case 3.
To locate the faulty part and cause, follow the flow below.
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